. >> the obama administration official who oversaw the launch of the government's healthcare exchanges is apologizing for the disastrous website, and promising service will improve. >> the bottom line conclusion is this healthcare.gov website is fixable. >> marilyn tavener says more than 700,000 people have filled out applications online. but the administration won't release enrollment numbers online. >> how will you know how many people will be enrolled? >> we'll have that next november. >>> we've got to 44 votes. 48 votes now. of you trying to dismantle the legislation. you call that cooperation? i don't. >> republicans use the hearing to argue the problems go beyond the website. and that the healthcare law is not as advertised. >> the white house.gov website says if you want to keep the healthcare insurance you want, you can keep it. now they're being told they can't. that's a lot. >> reporter: cbs news is learning that insurance providers are dropping more than 2 million people, and sending them into the government's exchanges. they said the canceled plans did not meet the minimum